Power shovel hoisting mechanism controlling means



1,484,245 C.'A. WEBER POWER SHOVEL HOISTING MECHANISM CONTROLLING MEANS Feb. 19 1924.

Filed Oct. 5, 1921 :s Sheets-Sheet 1 CHARLES A. WEBER INVENTOR.

' ATTORNEYS Feb. 1911924. 1,484,245

C. A. WEBER rowan SHOVEL HOISI'ING MECHANISM CONTROLLING MEANS Filed 001;. s, 1921 s Sheets-Sheet 2 CHARLES A.WEBE'R INVENTOR.

# ATTORNEYS C. A. WEBER- POWER SHOVEL HOISTING MECHANISM CGNTROLLING MEANS Feb. 19 1924. I

Filed Oct. 5, 1921 3 Sheets-Sheet 5 CHARLES A. WEBER INVENTOR.

ATTORNEYS Patented Feb. 19, 1924.

UNITED STATES 'PATVENTTOFVFIVCE.

CHARLES A. WEBER, or LORAIN, onio, ASSIGNOR TO THE 'rnnw SHOVEL ooMr Nr, or LORAIN, OHIO, A CORPORATION or cure.

POWER SHOV'EL HOISTING'MECHANISM CONTROLLING, MEANS.

, Application filed October 3, 1921.

T aZZ whom it may concern:

Be it known that I, CHARLES A. WEBER, a citizen of the United States, residing at Lorain, in the county of Lorain and State I of Ohio, have invented certain new and useful Improvements in Power Shovel Hoisting Mechanism Controlling Means; and I do hereby declare the following to be a full, clear, concise, and exact description of the invention, such as will enable those'skilled in the art to which it appertains to make and usethe same.

This invention relates to power shovel hoisting mechanism controlling means, and consists in certain improvements in the construction thereof, as will be hereinafter fully described and pointed out in the claims. In the practical use of power shovels, crane mechanisms, and the like, it has been found desirable to simplify the operations required, in order to operate the controlling mechanism for the hoisting means, since in the ordinary commercial construction it has been found that it is sometimes impossible for the operator to manipulate variously operated levers quickly enough, one after the other, to accomplish the most desirable controlling result, and it is an object,'therefore, of my invention to so arrange the controlling an mechanism of a power shovel or crane whereby the hoisting apparatus may be manually controlled by foot to lower the load and to maintain the shovel or bucket at any desired elevation, the same being accomplished in as a mechanism of simple construction and with a minimum of manual effort.

It is a further object of my invention to so accomplish the result sought that the mechanical effort required will be natural 40 and wherein the second part of the operation,that of locking the bucket or shovel in a given elevated positionwill be accomplished as a continuation of the effort requiredin causing the first part ofthe operation, that is, the operation whereby the hoisting clutch mechanism is disconnected to permit the lowering of the shovel or bucket.

Another object of my invention is to enable the operator, by merely operating a foot pedal, to lower the shovel or bucket and by a further depressing of the pedal to stop Serial No. 504,995.

the downward movement of the shovel or bucket whenever this is desired. Anotherv object of my invention consists in the improvements in: the apparatus operat- 3 ing under the control, of the foot operated pedal, and as will be later described.

Other objects of my invention and the invention itself will be more apparent by reference to the accompanying drawings, in whicli- Fig. 1 shows a plan view of a portion of a steam shovel mechanism in which my invention is embodied. This view shows the controlling levers, a view of the intermediate controlling links and a clutch, said clutch being associated with the hoisting drum of a steam shovel; also a view of a foot pedal, a clutch controlling ram under the control of the foot pedal and a foot pedal operated brake. V i

Fig. 2 shows a side elevational view ofv a portion of the apparatus shown in Fig. 1. Fig. 3 shows a view similarto Fig. 2, some of the intervening apparatus being removed, so as to expose the brake mechanism. I

Fig. 4 shows a vertical cross section of the steam ram and steam ram controlling means, the mechanical link connecting the valve controlling means, and the brake foot pedal being indicated in this figure.

Referring now to the various figures, in all of which like parts are indicated by like reference characters, at 2 is shown .an engine cylinder, of which one or moremay be ,pro- 85 vided, containing a piston, said piston adapted to rotate a shaft 4 by means of a piston rod 5 attached to the piston and a reciprocating driver rod 6. The engine'hav. ing the cylinder2 is adapted to be operated by steam power and for the purpose of rotating the hoistingdrum30,said drum having secured thereto a friction wheel 39. The hoisting drum 3O is mounted on a shaft 31.

The shaft'31 is carried by bearings 32 in the frame 33. A friction clutch band 34 is adapted to be contracted to grip the hoisting drum friction wheel; 39. The friction band is anchored by means'of a bolt 35, said bolt passing through a pin 36 and being secured 10o thereto on either sideby nuts 37, said pin} being mounted on the gear wheel 38. The

friction band is adapted to be contracted by having its other end 49, which is carried on a pin 40, moved thereby in the direction of the bolt 35, securing the other end of the band. p

g The pins 40 and 43 are adapted to rotate about a center crank shaft journal 41, being disposed on difi'erent radii extending substantially at right angles one from the other, the center of rotation comprising the journal 41. Therefore, whenit isfdesire for-the clutch band to grip the clutch drum, the same is accomplished by longitudinally movingthe clutch operating link member 42, which'has' an opening in its upper end, through which opening the pin 43 projects, the longitudinal movement of the member 42 in an upward direction, therefore,--causing the pin'40 to be moved in a counter-clockwise direction about the center crank journal41. f-

The clutch operating link 42=is caused to move the pin 43 up. or down to operate the clutch, or to release it by the action of the steam ram having a casing shown at 24, a piston 47 and piston rod 25. The motion of the piston rod is communicated to a pair of link members 26, to which it is secured by a pin 27, the said link members being adapted to operate a crank shaft 46 having crank arms 45 and 48. Two crank arms 45 are secured to shaft 46,'operating as one, the end of each containing an elongated perforation 101 adapted to embrace lugs 50 extending through the said perforation, the said'lugs being carried on a collar 102,'and whichcollar fits-within a groove contained in a collar 44, said collar being longitudinally movable onthe shaft 31 and having a connection with the clutch operating link 42. Thus, when the piston rod 25 is reciproc'ated, the link 42 will also be reciprocated to clutch or unclutch the brake band 34. The action ofthe piston 47 is controlled by a controlling valve 51, operating over the ports 52 and 53, said valve being provided with a valve port 54 adapted to 7 "connect either the port '52 or 53 with an exhaust port 55, the exhaust port leading to the exhaust passage 56. Steam enters one Or the other of the p p it is uncovered by the valve 51. As shown,

ports 520i" 53as the port 53 is open and steam entering the said port the engine piston 47 will be driven to the left, as seen in Fig. 4. With the valve in" this position,.steam is exhausting byway of the passage57, the valve port 54, the exhaust port 55 and the exhaust passage 56.

It will be observed that by moving the valve 51 on its seat to theright, the port 53 will be covered by the port 54 and the port 52 will be uncovered, thus making a passage for exhaust steam between theport 53 and the exhaust port 55, and at the same time opening the port 52' for theingress of steam to the cylinder at the left of the plston 47, said piston then being caused to move, as shown in Fig. 4, to the right. Thus the clutch may be contracted or expanded to grip-or release the clutch drum, as may be desired, dependingupon the position of, the valve 51 on its'seat within the valve,

casing 24. V

In order to 22, the connecting link being pivoted at 23 and 20 to the lever arm 22 and the foot pedal 16, respectively. The lever arm 22, V

is adapted to rotate on a shaft 85' to which it keyed bykeys 18. I Theleve'r arm" '2 2' terminates on its lower end in'a projecting controlling cam 87, which, as shown in Fig.

4, projects into the recess 88 of'the valve member 51 and is adapted whenthe arm 22 is rotated'on the shaft '85- to'propel the valve member 51 to the right and back to the left, as maybe desired; Thevalve mem-T her 51 has itsupper portion so shapedfthat when the valve 51 is moved to its extreme right-hand position, the projection 87} will ride upon the curved surface 89 of the valve. member51, but without further mov'ing'the valve member. 7' i V The moving parts areso related and 1'n.

ter-connected that in the embodiment of my inventionillustrated, when the valve is in the position illustrated in Fig.4, that'is,

when the pedal is depressed, steam? will- 1 enter the. right portion of the cylinder through the port 53, to move'thepiston 47' to. the left, thus 'causing an unclutchin'gof the engine from" the hoisting drum and the hoisting drum would thereupon be; released from the propelling influence of the engine,

andthepower shovel or dipperof' the de-:

vice, which may have been" previously. ele

vated, "would bygravity descend, causing an unwlnding of its holsting-cable on the drum, this motion being suitablyflretarded by additional pressure placed by 'the "foot of the operator on the peda-l'l18 of'thepedal member 16. This retardin'g'is accomplished by rotating the pedal shaft 11"to"which the pedal member 16 is non rotatably secured,

the shaft 11 carrying, at .a point. remote from the pedal and below the brake mechanism (shown best in Fig) 3), a brake-open" ating lever 12, said lever. being connected by a tie-rod 13 to an end 17 of the-brake band, the other end 3 of the bra'lre-bandbeing rigidly secured atai point 91 by'a tie rod 92 to the frame 33 of the mechanism.

"The brake band 93having ends sand 17 i is adapted thereby to be contracted to grab the brake drum 94 more or less'tightly', de-" pending upon the degree of pressure exerted by the operator on the pedal 18 of the pedal ibi 4 dotted lines in Fig. 3,.the pedal member 16 may be latched under a .hooklatch member 1 95, said hook latch restraining the pedal member 16 from returning to upper normal position, as shown by the solid lines inFig. 3, under the retractile power of the spring 15, which it otherwise would do. This pedal member may be maintained in fully operated hoisting drum braking position whenever desired, as, for instance, when the machine is traveling, or when it is desired to leave the machine inoperative for a period, or at any other time, for any other reason it is desired to maintain the dipper or bucket in any given elevated position.

Although the hoisting boom and other power shovel or crane apparatus usually associated with the mobile power shovel or crane mechanism is not specifically illustrated in the drawings, being omitted for the sake of simplicity of disclosure of the parts described, it will be. understood that such parts are used in connection with a boom or like equivalent device having a shovel, or the equivalent means, on its end, over which a hoisting cable is adapted to pass, the cable connecting the bucket or dipper mechanism to the hoisting drum over which it is adapted to be wound.

For a more complete-showing of such a structure, I refer to my copending application, Serial No. 417,093, filed October 15,-

1920. My invention, however, may be used in connection with other arrangements wherein a cable wound over a drum may not be employed.

Having thus describedmy invention in a specific embodiment, I wish it to be understood that numerous and extensive departures from the embodiment herein illustrated and described may be made, but Without departing from the spirit of my invention, which is defined in the following claims:

' 1. In combination, a hoisting mechanism comprising a hoisting drum, a source of power, a clutch, said clutch when operated adapted to cause the rotation of the said drum by the said source of power, a foot operated lever, a brake, said brake adapted to oppose the rotation of the said drum,

a source of fiuid pressure, a cylinder, a pieton, a piston rod, and mechanical link connections between the said piston rod and the said clutch, means to admit fluid under pressure from the said source of pressure tothe cylinder on either side of the said piston, said foot operated lever being adapted to control the fiow of fluid pressure to the said cylinder and other link connections between the said lever and the said brake, whereby the lever controls the operation of the said brake.

2. In combination, a hoisting mechanism comprising a hoisting drum, a source of power, a clutch adapted to connect said source of power with said drum and cause rotation thereof, a power operated mechanism for operating said clutch, a brake mechanism adapted to .oppose, the rotation of said drum, andmeans connected to said power operated mechanism for operating the clutch and to said brake mechanism to simultaneously move said clutch and said brake in opposite directions of application to said drum.

3. In combination, a hoisting mechanism comprising a hoisting drum, a source of power, a clutch adapted to connect said source of power with said drum and cause rotation thereof, a power operated mechanism for operating said clutch, a brake mechanism adapted to oppose the rotation of said drum, and a-single means connected to said clutch operating mechanism and to said brake mechanism to control the operation of said clutch and said brake,

4. In combination, a hoisting mechanism comprising a hoisting drum, a source of power, a clutch adapted to connect said source of power withsaid drum and cause rotation thereof, a power operated mechanism for operating said clutch, a brake mechanism adapted to oppose the rotation of said drum, and a foot operated lever connected to said clutch operating mechanism and to said brake mechanism to simultaneously efl'ect various relations vof said clutch and said brake in its normal,intermediate and fully depressed positions, the clutch being engaged and the brake released When said foot lever is in normal position, the clutch being disengaged and the brake engaged when said foot lever is in intermediate position, and the clutch being positively disengaged and the brake being is in final position.

5. In combination, a hoisting mechanism comprising a hoisting drum, a source of power, a clutch adapted to connect said source of power with said drum and cause rotation thereof, a power operated mecha nism for operating said clutch, a brake mechanism adapted to oppose the rotation of said drum, a foot lever connected to said clutch operating mechanism and to said brake operating mechanism to effect various relations of said clutch and said brake with said drum, a spring to retain saidlever in normal position toengage said clutch with and disengage said brake from said drum, and means to lock said foot lever in final depressed position to disengage said clutch and engage said brake with said drum.

6. In combination, a hoisting mechanism comprising a hoisting drum, a source of power, a clutch adapted to connect said source of power with said drum and cause positively disengaged when said foot lever rotation thereof, a power operated mecha-T nism for operating said clutch, a brake mechanism adapted'to oppose the rotation of said drum, a singlenieans'connected to "a said clutch operating mechanism and to said brake mechanism to control the operation of said clutch and said brake, and means incense for retaining said 'singlecontrolling means at each extremity of its movement.

In Witness whereof, I- have hereunto signed my name this 25th day of September, 1921. p

CHARLES A. WEBER. 

